Open research questions in Genomic variations and chromosomal abnormalities

What the literature leaves open

• Further evaluation of the direct microhaplotype genotyping framework, - Application of the framework to other species and datasets, - Investigation of the potential for microhaplotypes in kinship inference and parentage analysis

  Direct microhaplotype genotyping for GT-seq (Genotyping-in-Thousands by Sequencing) using a diploid abundance model · 2026 · DOI

• Most analytical pipelines for GT-seq data focus on single SNPs or rely on alignment-based variant calling. These approaches may not fully utilize the information contained in the sequencing data. There is a need for a direct microhaplotype genotyping framework that can leverage the high read depth and low error rates of modern sequencing technologies.

  Direct microhaplotype genotyping for GT-seq (Genotyping-in-Thousands by Sequencing) using a diploid abundance model · 2026 · DOI

• The patient presented with generalized cutaneous edema and feeding intolerance. The patient had poor weight gain and short stature. The family declined further diagnostic evaluation and therapeutic interventions, making it challenging to manage the patient's condition.

  Case Report: Novel rare ZMPSTE24 variation in a Han Chinese family with early onset mandibuloacral dysplasia type B lipodystrophy · 2026 · DOI

• The patient's family declined further diagnostic evaluation and therapeutic interventions, - The patient was lost to follow-up, - Radiographic imaging of the hands and feet was not obtained

  Case Report: Novel rare ZMPSTE24 variation in a Han Chinese family with early onset mandibuloacral dysplasia type B lipodystrophy · 2026 · DOI

• Investigating the relationship between EF and cognitive ability in larger samples, - Examining the neural mechanisms underlying EF deficits in 3q29del, - Developing more effective screening tools for neurodevelopmental and psychiatric phenotypes in 3q29del

  Beyond IQ: executive function deficits and their relation to functional, clinical, and neuroimaging outcomes in 3q29 deletion syndrome · 2024 · DOI

• The nuances of executive function in individuals with 3q29 deletion syndrome have not been described. The relationship between executive function and cognitive ability in individuals with 3q29 deletion syndrome is not well understood. The relationship between executive function and neuroimaging outcomes in individuals with 3q29 deletion syndrome has not been investigated.

  Beyond IQ: executive function deficits and their relation to functional, clinical, and neuroimaging outcomes in 3q29 deletion syndrome · 2024 · DOI

• Whether these associations generalize to large, heterogeneous population biobanks, and whether they reflect locus-specific or distributed genetic effects, remains unclear.

  Pleiotropic and Distributed Neuropsychiatric Effects of Neurodevelopmental Copy Number Variants in the All of Us Biobank · 2026 · DOI

• Despite their importance, the effectiveness of clinical exome sequencing (CES) in detecting CNVs, particularly small ones, remains incompletely understood.

  High positive predictive value of CNVs detected by clinical exome sequencing in suspected genetic diseases · 2024 · DOI

• The lack of understanding of the genetic mechanisms underlying the neurodevelopmental phenotype. The limited number of prenatal cases reported in the literature.

  SRSF1 haploinsufficiency drives the neurodevelopmental phenotype of the 17q22 deletion syndrome · 2026 · DOI

• The paper identifies a gap in the understanding of human genetics and its role in medicine. The paper identifies a gap in the understanding of the cytogenetic method and its importance in detecting genetic diseases.

  HUMAN GENETICS AND CYTOGENETIC METHODS · 2026 · DOI

• The joint contributions of rare and common genetic variation, development, and environment to complex traits are not well understood. Prior studies have been limited by statistical power. There is a need for a standardized pipeline for CNV genotype assignment.

  Combinatorial effects of gene dosage, polygenic background and environment on complex traits · 2026 · DOI

• In-depth study of the topic will contribute significantly to the advancement of medical genetics and reproductive medicine. Technologies such as CRISPR gene editing, folate supplementation, and control of age-related risks can substantially reduce disease incidence.

  CHROMOSOMAL MUTATIONS AND ASSOCIATED HEREDITARY DISEASES: ETIOLOGY AND PATHOGENESIS · 2026 · DOI

• The need for a deeper understanding of the etiology and pathogenesis of hereditary diseases. The need for effective prenatal screening and genetic counseling.

  CHROMOSOMAL MUTATIONS AND ASSOCIATED HEREDITARY DISEASES: ETIOLOGY AND PATHOGENESIS · 2026 · DOI

• Few approaches address the complete cytogenetic workflow in a clinically aligned manner. Manual karyotype analysis remains a labor-intensive and expertise-dependent process.

  Automated karyotyping and structural anomaly detection through a hybrid multi-stage deep learning framework integrating chromosome detection, pairwise classification, and autoencoder-based analysis · 2026 · DOI

• Future work will focus on stain normalization, upstream instance segmentation to further mitigate borderline overlaps, explicit probability calibration, band-aware representations for acrocentric discrimination, and multi-center validation to assess robustness under heterogeneous imaging conditions.

  Automated karyotyping and structural anomaly detection through a hybrid multi-stage deep learning framework integrating chromosome detection, pairwise classification, and autoencoder-based analysis · 2026 · DOI

• There is a need to expand the genetic and clinical spectrum of CXCR2-related disease. There is a need to raise awareness of CXCR2 deficiency as a distinct form of congenital neutropenia.

  Case Report: Novel CXCR2 compound heterozygous variants in an infant with neutropenia · 2026 · DOI

• The lack of effective diagnostic approaches for complex chromosomal rearrangements. The need for an integrated cytogenomic workflow in characterizing rare SVs and CCRs.

  Resolving Complex Chromosomal Rearrangements and Rare Structural Variants: An Integrated Cytogenomic Analysis of Four Cases · 2026 · DOI

• The impact of reversion on aneuploid karyotype stability and persistence in populations is unclear. The mechanisms underlying aneuploid karyotype dynamics are not well understood.

  Towards a unified model of aneuploid karyotype dynamics · 2026 · DOI

• further studies are needed to investigate the clinical significance of the genetic variants identified, - the role of EMSY in the development of lymphoproliferations should be further investigated, - the relationship between TNFAIP3 and large cell morphology should be further studied

  Study of inborn errors of immunity associated lymphoid proliferations identifies association of presence of somatic variations with large cell morphology, copy number alterations in TNFAIP3 and heterozygous variants in EMSY · 2026 · DOI

• Future research should investigate the mechanisms underlying the development of multiple organ dysfunction syndrome in patients with Turner syndrome. Future research should explore the effectiveness of different treatment strategies in patients with Turner syndrome and multiple organ dysfunction syndrome.

  Case Report: Infection-triggered multiple organ dysfunction syndrome as the initial presentation of undiagnosed turner syndrome in an 11-Year-Old girl · 2026 · DOI

• There is a lack of understanding of the potential for Turner syndrome to present as acute, life-threatening multiple organ dysfunction syndrome in children. There is a need for early genetic diagnosis and multidisciplinary management in patients with Turner syndrome and multiple organ dysfunction syndrome.

  Case Report: Infection-triggered multiple organ dysfunction syndrome as the initial presentation of undiagnosed turner syndrome in an 11-Year-Old girl · 2026 · DOI

• The molecular mechanisms underlying complex chromosomal rearrangements are not well understood. Long-read sequencing can be used to fill this gap. The study aims to provide a better understanding of the mechanisms underlying complex chromosomal rearrangements.

  Long-read genome sequencing resolves a de novo complex 18q12.1q21.2 triplication causing partial tetrasomy and reveals its underlying mechanism · 2026 · DOI

• The roles of transposable elements in the human brain remain largely unresolved. Short-read sequencing lacks the resolution to accurately map TE insertions.

  Long-read sequencing maps transposable element variation and its regulatory and epigenetic effects in the human brain · 2026 · DOI

• The study only included neonatal clinical samples. The sample size was limited to 106 samples. The study did not investigate the clinical significance of the genotypes in the study population.

  Analytical validation of a high-resolution melting assay for UGT1A1 TATA-box polymorphisms · 2026 · DOI

• Further studies are needed to investigate the clinical significance of the genotypes in the study population. The HRM assay should be validated in larger and more diverse populations. The study's findings can inform the development of personalized medicine approaches for UGT1A1-related disorders.

  Analytical validation of a high-resolution melting assay for UGT1A1 TATA-box polymorphisms · 2026 · DOI

Most-cited papers in Genomic variations and chromosomal abnormalities

• A second generation human haplotype map of over 3.1 million SNPs · Nature · 2007 · 3,825 citations
• Global variation in copy number in the human genome · Nature · 2006 · 3,436 citations
• Identification of the Cystic Fibrosis Gene: Chromosome Walking and Jumping · Science · 1989 · 2,434 citations
• Strong Association of De Novo Copy Number Mutations with Autism · Science · 2007 · 2,327 citations
• A map of human genome sequence variation containing 1.42 million single nucleotide polymorphisms · Nature · 2001 · 2,264 citations
• A Single Ataxia Telangiectasia Gene with a Product Similar to PI-3 Kinase · Science · 1995 · 2,205 citations
• Genetic Dissection of Complex Traits · Science · 1994 · 2,145 citations
• A comprehensive genetic map of the human genome based on 5,264 microsatellites · Nature · 1996 · 2,103 citations
• Large-Scale Copy Number Polymorphism in the Human Genome · Science · 2004 · 1,983 citations
• A draft human pangenome reference · Nature · 2023 · 1,170 citations

Most recent work

• Advancing regulatory variant effect prediction with AlphaGenome · Nature · 2026
• A complete diploid human genome benchmark for personalized genomics · Cell · 2026
• Genetic drivers and clinical consequences of mosaic chromosomal alterations in 1 million individuals · medRxiv · 2026
• HPRC2: A human pangenome reference with near-complete coverage of common genetic variation · bioRxiv · 2026
• Rare and Common Genomic Copy Number Variants Associated with Strabismus and Amblyopia in the All of Us Research Program · medRxiv · 2026
• Association of Fetal Gene Regulatory Gene Deletions With Poor Cognition in Schizophrenia and Community-Based Samples · American Journal of Psychiatry · 2026
• Combinatorial effects of gene dosage, polygenic background and environment on complex traits · medRxiv · 2026
• A framework to infer de novo exonic variants when parental genotypes are missing enhances association studies of autism. · Bioinformatics · 2026
• Retrotransposed gene copies persist under relaxed selection in wild Spodoptera frugiperda · Molecular Biology and Evolution · 2026
• Characterisation of the Novel HLA-B*15:779 Allele by Sequencing-Based Typing. · HLA · 2026

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